tofsee | 936ba202d93326862cec01d25e4092511f2362416ccf068d0f54b344cab20064

Analysis

max time kernel
143s
max time network
133s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
24/12/2023, 14:59

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General

Target

02a6d9f2a8ddc0e12270e8b39b2255e3.exe
Size

12.3MB
MD5

02a6d9f2a8ddc0e12270e8b39b2255e3
SHA1

d280cf802d5548da4b59a2d7fa4d3d7cf434dac5
SHA256

936ba202d93326862cec01d25e4092511f2362416ccf068d0f54b344cab20064
SHA512

729f4775b7c8381df1a4b620551672893c9c736216482712ef25d849eea4b691b42ad6b3a6654779346748a066bfc8135471bd2c6581f6fea81be18251f72ce1
SSDEEP

49152:kvVGWdbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb:kvV

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

43.231.4.6

lazystax.ru

Signatures

Tofsee
Backdoor/botnet which carries out malicious activities based on commands from a C2 server.
trojan tofsee

Windows security bypass 2 TTPs 1 IoCs

evasion trojan

Disable or Modify Tools

T1562.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Windows\SysWOW64\qunsqks = "0"	svchost.exe

Creates new service(s) 1 TTPs
persistence

Windows Service
T1543.003

Modifies Windows Firewall 1 TTPs 1 IoCs

evasion

Windows Service

T1543.003

pid	Process
2268	netsh.exe

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\qunsqks\ImagePath = "C:\\Windows\\SysWOW64\\qunsqks\\ujnrhull.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2004	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2816	ujnrhull.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2816 set thread context of 2004	2816	ujnrhull.exe	41

Launches sc.exe 3 IoCs

Sc.exe is a Windows utlilty to control services on the system.

pid	Process
2732	sc.exe
3044	sc.exe
2888	sc.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2184 wrote to memory of 2236	2184	02a6d9f2a8ddc0e12270e8b39b2255e3.exe	28
PID 2184 wrote to memory of 2236	2184	02a6d9f2a8ddc0e12270e8b39b2255e3.exe	28
PID 2184 wrote to memory of 2236	2184	02a6d9f2a8ddc0e12270e8b39b2255e3.exe	28
PID 2184 wrote to memory of 2236	2184	02a6d9f2a8ddc0e12270e8b39b2255e3.exe	28
PID 2184 wrote to memory of 2688	2184	02a6d9f2a8ddc0e12270e8b39b2255e3.exe	31
PID 2184 wrote to memory of 2688	2184	02a6d9f2a8ddc0e12270e8b39b2255e3.exe	31
PID 2184 wrote to memory of 2688	2184	02a6d9f2a8ddc0e12270e8b39b2255e3.exe	31
PID 2184 wrote to memory of 2688	2184	02a6d9f2a8ddc0e12270e8b39b2255e3.exe	31
PID 2184 wrote to memory of 2732	2184	02a6d9f2a8ddc0e12270e8b39b2255e3.exe	32
PID 2184 wrote to memory of 2732	2184	02a6d9f2a8ddc0e12270e8b39b2255e3.exe	32
PID 2184 wrote to memory of 2732	2184	02a6d9f2a8ddc0e12270e8b39b2255e3.exe	32
PID 2184 wrote to memory of 2732	2184	02a6d9f2a8ddc0e12270e8b39b2255e3.exe	32
PID 2184 wrote to memory of 3044	2184	02a6d9f2a8ddc0e12270e8b39b2255e3.exe	34
PID 2184 wrote to memory of 3044	2184	02a6d9f2a8ddc0e12270e8b39b2255e3.exe	34
PID 2184 wrote to memory of 3044	2184	02a6d9f2a8ddc0e12270e8b39b2255e3.exe	34
PID 2184 wrote to memory of 3044	2184	02a6d9f2a8ddc0e12270e8b39b2255e3.exe	34
PID 2184 wrote to memory of 2888	2184	02a6d9f2a8ddc0e12270e8b39b2255e3.exe	36
PID 2184 wrote to memory of 2888	2184	02a6d9f2a8ddc0e12270e8b39b2255e3.exe	36
PID 2184 wrote to memory of 2888	2184	02a6d9f2a8ddc0e12270e8b39b2255e3.exe	36
PID 2184 wrote to memory of 2888	2184	02a6d9f2a8ddc0e12270e8b39b2255e3.exe	36
PID 2184 wrote to memory of 2268	2184	02a6d9f2a8ddc0e12270e8b39b2255e3.exe	39
PID 2184 wrote to memory of 2268	2184	02a6d9f2a8ddc0e12270e8b39b2255e3.exe	39
PID 2184 wrote to memory of 2268	2184	02a6d9f2a8ddc0e12270e8b39b2255e3.exe	39
PID 2184 wrote to memory of 2268	2184	02a6d9f2a8ddc0e12270e8b39b2255e3.exe	39
PID 2816 wrote to memory of 2004	2816	ujnrhull.exe	41
PID 2816 wrote to memory of 2004	2816	ujnrhull.exe	41
PID 2816 wrote to memory of 2004	2816	ujnrhull.exe	41
PID 2816 wrote to memory of 2004	2816	ujnrhull.exe	41
PID 2816 wrote to memory of 2004	2816	ujnrhull.exe	41
PID 2816 wrote to memory of 2004	2816	ujnrhull.exe	41

C:\Users\Admin\AppData\Local\Temp\02a6d9f2a8ddc0e12270e8b39b2255e3.exe
"C:\Users\Admin\AppData\Local\Temp\02a6d9f2a8ddc0e12270e8b39b2255e3.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2184
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\qunsqks\
  2⤵
  PID:2236
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ujnrhull.exe" C:\Windows\SysWOW64\qunsqks\
  2⤵
  PID:2688
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create qunsqks binPath= "C:\Windows\SysWOW64\qunsqks\ujnrhull.exe /d\"C:\Users\Admin\AppData\Local\Temp\02a6d9f2a8ddc0e12270e8b39b2255e3.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:2732
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description qunsqks "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:3044
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start qunsqks
  2⤵
  - Launches sc.exe
  PID:2888
- C:\Windows\SysWOW64\netsh.exe
  "C:\Windows\System32\netsh.exe" advfirewall firewall add rule name="Host-process for services of Windows" dir=in action=allow program="C:\Windows\SysWOW64\svchost.exe" enable=yes>nul
  2⤵
  - Modifies Windows Firewall
  PID:2268

C:\Windows\SysWOW64\qunsqks\ujnrhull.exe
C:\Windows\SysWOW64\qunsqks\ujnrhull.exe /d"C:\Users\Admin\AppData\Local\Temp\02a6d9f2a8ddc0e12270e8b39b2255e3.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2816
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Windows security bypass
  - Sets service image path in registry
  - Deletes itself
  PID:2004

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Defense Evasion

Impair Defenses

T1562

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\ujnrhull.exe

Filesize
13.8MB

MD5
c29c2233ef9cdd755b734e34c08d4abf

SHA1
6c0d26eeda3866654dd719e406e64fe3fdf650ca

SHA256
d70bc3570cb7036375ce2a11531b073ed9d6d1ceffbde7292d760d9e11773598

SHA512
0d12f61774655d763112aeec4d2cc42a9390c804f932f03bb284966ac60cbb33005a6a309d2c76f1c7a536ebaef814c5031c730727b42cf59ae6933a0196379c

Download Submit
C:\Windows\SysWOW64\qunsqks\ujnrhull.exe

Filesize
7.0MB

MD5
b348291a8008e355ac698ad064744579

SHA1
4c2c7517031ff9b6c28e47bb2b235711915c9029

SHA256
2599fc19d187928242913d50e22b5c37187809b0613b95bcef98487ee20245bc

SHA512
cc7f1f8dee14cbb62a3136498af387b99c456ca021254342135de79f28054491743930b31d8d72ea55d284237faf7d3d6844bf6ecc3c35aaf4eed0ad6c465bea

Download Submit
memory/2004-20-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2004-12-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2004-22-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2004-21-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2004-19-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2004-15-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2004-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2184-8-0x00000000001B0000-0x00000000001C3000-memory.dmp

Filesize
76KB

Download
memory/2184-1-0x0000000000270000-0x0000000000370000-memory.dmp

Filesize
1024KB

Download
memory/2184-4-0x0000000000400000-0x0000000000C17000-memory.dmp

Filesize
8.1MB

Download
memory/2184-7-0x0000000000400000-0x0000000000C17000-memory.dmp

Filesize
8.1MB

Download
memory/2184-2-0x00000000001B0000-0x00000000001C3000-memory.dmp

Filesize
76KB

Download
memory/2816-11-0x0000000000400000-0x0000000000C17000-memory.dmp

Filesize
8.1MB

Download
memory/2816-10-0x0000000000CC0000-0x0000000000DC0000-memory.dmp

Filesize
1024KB

Download
memory/2816-16-0x0000000000400000-0x0000000000C17000-memory.dmp

Filesize
8.1MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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